John W. Schoen, CNBC, wrote in a June 2016 article that “the National Shooting Sports Foundation estimates there are roughly 5 million to 10 million AR-15 rifles [privately] owned in the United States. . . .” The U.S. Government has purchased an estimated eight million of the military version for use by our armed forces and our allies.

The AR-15 rifle uses military ammunition. It has a rapi...